Aperture Tag: The Paint Gun Testing Initiative is a Portal 2 Mod. It's time to think with Gels! The Portal-Gun is gone, but the testing must go on! Grab the Paint-Gun Device and solve brand new test chambers in ways you've never solved them before!
User reviews:
Very Positive (128 reviews) - 80% of the 128 user reviews in the last 30 days are positive.
Mostly Positive (2,122 reviews) - 76% of the 2,122 user reviews for this game are positive.
Release Date: Jul 15, 2014

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Community-Made Mod

This community-made mod requires that you have Portal 2 installed prior to running this game.

Click here to learn more about mods on Steam.

Aperture Tag: The Paint Gun Testing Initiative



“If you're like me, when you played Portal 2, you covered every room in as much bouncy gel as possible. Well now it's a whole lot easier, and you can color coordinate the walls with orange gel.”

“A surprising and fresh revival of Portal 2’s familiar puzzle elements.”
Jeep Barnett

“It looks great, it plays well, and it lasts 2-3 hours, giving it good value for money.”

Steam Greenlight

About This Game

Aperture Tag: The Paint Gun Testing Initiative is a community-made mod for Portal 2, inspired by TAG! The Power of Paint. The familiar Portal 2 gels are now contained within the Aperture Science Paint Gun Device and it's your job to test it out!

Featuring a new personality-core and an original story with 27 polished levels; the mod offers an exciting and fun experience in varied and interesting new locations throughout Aperture Science.

Introducing gels as the core gameplay mechanic completely changes the way you solve puzzles, explore, and survive all the challenges thrown at you!

Key Features

  • New Gameplay Mechanics for Portal 2
  • 27 Original Maps and a Full Campaign
  • A New Character with Original Voice-Acting
  • In-Game Level Editor
  • Access to the Source Files used to create the Aperture Tag
  • Single-Player and Co-op Workshop Integration with Source Instances to create your own Paint Gun Maps
  • Steam Trading Cards
  • Full Developer Commentary
  • Completely original Soundtrack by Abarax, Harry101UK, and Christopher McEvoy

System Requirements

Mac OS X
    • OS: Windows 7 / Vista / XP
    • Processor: 3.0 GHz P4, Dual Core 2.0 (or higher) or AMD64X2 (or higher)
    • Memory: 1GB XP / 2 Vista GB RAM
    • Graphics: Video card must be 128 MB or more and should be a DirectX 9-compatible with support for Pixel Shader 2.0b (ATI Radeon X800 or higher / NVIDIA GeForce 7600 or higher / Intel HD Graphics 2000 or higher).
    • Storage: 4 GB available space
    • Additional Notes: Requires a Steam version of Portal 2 Installed
    • OS: MAC OS X 10.6.7 or higher
    • Processor: Intel Core Duo Processor (2GHz or better)
    • Memory: 2 GB RAM
    • Graphics: ATI Radeon 2400 or higher / NVIDIA 8600M or higher / Intel HD Graphics 3000
    • Storage: 4 GB available space
    • Additional Notes: Requires a Steam version of Portal 2 Installed
Customer reviews
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Very Positive (128 reviews)
Mostly Positive (2,122 reviews)
Recently Posted
( 12.4 hrs on record )
Posted: July 21
Nice try, but no. 1. Some of the chambers-not many, to be fair-require many tries, not thinking. That doesen't make it difficult, it makes it frustrating. 2. I was at test chamber "4-8" when i accidentally pressed "4.The stage" on the main menu that put me at the begining of chapter 4, so, because i can only access latest autosave, i have to do chambers 4.1-8 all over again. Or just delete the game. A big disappointment for me and a thumbs down for the game.
Helpful? Yes No Funny
7 Grand Krab
( 9.1 hrs on record )
Posted: July 19

soundtrack has some crappy metal version of Still Alive

you can go speedy

you can go bounce

you can go ♥♥♥♥ yourself



nigel's voice

the bad ending

workshop is full of kids trying to be level designers

overall it's pretty ok
Helpful? Yes No Funny
( 10.9 hrs on record )
Posted: July 19
Aperture Tag: The Paint Gun Testing Initiative is a Portal 2 Mod but without the Portal-Gun. Now you have to solve the tests with the Paint-Gun which includes the blue and the orange gel. Apart from this the gameplay is exactly the same and that’s nice. It’s not a perfect game but a must have for every Portal fan.

The events take place after the events of Portal 2's cooperative campaign's Mobility Gels course, and before the events of the Art Therapy course. You play as an unnamed test subject and meet the personal core Nigel. Just like GLaDOS he is not friendly and humiliate the player in every situation.

You don’t have a Portal-Gun, just a Paint-Gun but the gameplay doesn’t changes very much. The tests are different and there are also portals but the focus in this game is the Paint-Gun with the gels. It’s funny but not very hard. The biggest problem is that it’s very short and only a few levels are a bit difficult but if you want a hard game get Portal Stories: Mel. Aperture Tag isn’t a bad game it’s a lot of fun with new mechanics and if the developers release a new Portal mod I will buy that.

This game is created with Valve's Source Engine so the graphic is nice but nothing special. It has the same visuals than Portal 2. The performance is also nice and stable, like all Source games you can minimize the game without the fear that you can't maximize it back. In 2016 this game looks very well like all source games.

You are alone and without friends in an unbelievable big complex under the earth in many test chambers. With the nice visual effects thanks to the Source Engine and the great soundtrack Aperture Tag has a really bizarre atmosphere like Portal 2.

I read that people complained about the price and that they compare it always with Portal Stories: Mel which is free. Would you release a mod/game for free? Aperture Tag: The Paint Gun Testing Initiative costs only $05,00 and on sale you can get it for $01,00. Both prices are okay, think about it. I like that game and thanks to the workshop this game has a lot of interesting and challenging content too. It’s a nice change and if you like the Portal games you will like this too.
Helpful? Yes No Funny
( 5.9 hrs on record )
Posted: July 18
good portal mod. picked it up for 90 cents at steam sale. is it worth 5 bucks? yes and no. portal stories: mel offers a far richer experience, and Thinking with time machine is good as well, if short. both are free. the "new characters and story" are pretty paper thin. buy it if you want a few good hours of paint fun, with some portals thrown in, but whether you pay full price for it or not is up to you
Helpful? Yes No Funny
( 1.5 hrs on record )
Posted: July 17
The thing that really put me off from this mod was the voice acting. I think that the creator knows it and if he dosent I hope that he wont be offended. But he really is not fit for being a voice actor. The voice of Neil sounds childish and cringy. The jokes are dull and the character itself is lame.
The gel gun is interesting and fun to use at times however it is really only a concept. The transaction from the concept to a game was really bad. It had very much potential but the level design was way too simple.
When the maps werent easy they were super hard, you had to go as far as the game mechanics allowed you to go to be able to do some jumps.
However I cant complain too much, I got this game for 0.99 euros and it was worth is. However if I had to get it again I would wait for a sale.
The creator obviously cared about the game and that you could see. Im sure most people are gonna have a great time with this mod but it was just not something that clicked with me.
Helpful? Yes No Funny
( 3.8 hrs on record )
Posted: July 17
Un dlc foarte frumos pentru Portal 2 merita fiecare banut. Nou gameplay in loc de portal gun un gel gun care vei rezolva puzzle-uri desigur cu geluri albastru si portocaliu adica sarit si viteza care sunt foarte interesante.
Helpful? Yes No Funny
Alexor Cuts
( 1.1 hrs on record )
Posted: July 15
Well, not bad, but not good. While the characters, I think are well written, there's no reason to like them apart from a usual "huh that's funny".
It tried to take a mechanic from Portal 2 and develop it, when there wasn't much to develop. It gets boring really, really, quick.
And apart form that, this might be nitpicking, but it has A LOT of bugs, glitches, etc...
One of them being many unfinished sections of the roof and environment that do have texture, but no hitbox.
I give it a "Meh" out of "Hey that's pretty goo- I'm kidding that joke is cancer".
Helpful? Yes No Funny
The Most Lushious of Memes
( 17.0 hrs on record )
Posted: July 15
absaloutely friken mind-bending. but not so mind-bending as Portal Stories Mel was....which is good by the way!
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Sgt. Buttersworth [E-308]
( 2.9 hrs on record )
Posted: July 14
No amount of science is too much science.
Helpful? Yes No Funny
( 7.5 hrs on record )
Posted: July 12
This is a very fun game! However, expect excruciating pain in your brain, as a few of the tests left me stumped for quite a while. Just be patient, and you'll figure it out eventually!
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Most Helpful Reviews  In the past 30 days
24 of 34 people (71%) found this review helpful
1 person found this review funny
2.9 hrs on record
Posted: June 24
This mod requires ownership of Portal 2. This review also assumes you already own and have completed Portal 2, my review of which can be read here.

Mod: Aperture Tag: The Paint Gun Testing Initiative
For the game: Portal 2
Developer and publisher: Aperture Tag Team
Released: 16 July, 2014
Genre: First-Person Puzzler with Comedy
Setting: "At least 50,000 years" after Portal 1, Aperture Science Enrichment Center, Upper Michigan, U.S.A., Earth
Canon status: Non-canon
Spoiler-free plot summary: Between the events of the Mobility Gel and Art Therapy courses in Portal 2's co-op campaign, GLaDOS begins testing with her new backlog of human test subjects. You play as one of the unnamed female test subjects, guided by the Personality Core called Nigel, in a series of new tests dedicated to Mobility Gel research.

Full review: Aperture Tag is a mod for Portal 2 equal in length and difficulty to Portal 1 (my review of which can be read here). This mod is probably the most fun mod of Portal 2's I've ever played. Unfortunately, however, I found that the test chambers were too easy and the story was too lackluster to warrant a second playthrough.

Like other Portal mods, Aperture Tag's main game mechanic (or gimmick, if you prefer) is based on expanding a mechanic seen in the original game. In this case, it's using a gun that shoots either blue or orange mobility gels. Only a small handful of test chambers make use of portals.

Carried over from Portal 2 is Steam Workshop support, which is also set in Portal 2's multiverse storyline.

A short, simple review for a short, simple mod. Do I recommend buying Aperture Tag? Well, here's where things get tricky...

Being a third-party mod for a game, and being based off a different development team's ideas, Aperture Tag has only a few original ideas. Because of this, personally, I don't think this mod should have to be purchased in order to play it. Instead, an optional donation system should be set up, either on Aperture Tag's Steam store page or in the mod itself. I do recommend playing Aperture Tag, but only if you can get it for free some way. But if you're desperate for something set in the Portal universe, then I suppose it'd be okay to spend a dollar or two on it, but not NZD$5.99, so wait for when this mod is on sale.
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12 of 14 people (86%) found this review helpful
1 person found this review funny
5.6 hrs on record
Posted: June 28
This is insanely amazing and a must play mod for any portal fan.

Interesting, challenging and innovative puzzles — check.
Fulfilling references to the original — a very good check.
Music — o my gawd, a huge check!
Some extra secrects and fun stuff — check indeed!

I'm lost at what to say more. This is amazing.
Was this review helpful? Yes No Funny
25 of 41 people (61%) found this review helpful
2 people found this review funny
Not Recommended
2.9 hrs on record
Posted: June 26
Later in the game, it isn't frusterating. The puzzles are fun later on.
"If you stop even for a second, you are a dead test subject. Go!"
Good thing I got this on sale. Portal Stories: Mel is a lot more challenging, playable, and it has better level design, aesthetics, and story, and that's FREE. This is an embarrassment to be $5.
As I play through this game, I realize that the first part of the game is really annoying.
Get this on sale if you want a try.
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6 of 7 people (86%) found this review helpful
8.8 hrs on record
Posted: July 4
Changing the formula of Portal game - extremely good, I enjoyed very much.
The tests not too difficult, less difficult than stories mel.
I bought him for just one dollar, extremely good value.
The plot is not the strong side of the game.
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5 of 6 people (83%) found this review helpful
1 person found this review funny
1.3 hrs on record
Posted: June 30
The voice acting is not the best but overall the game is fun.
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6 of 8 people (75%) found this review helpful
1 person found this review funny
5.7 hrs on record
Posted: June 29
Fun, if rather, short. The use of the paint gun was a nice diversion from the use of portals and kept me hooked throughout the game.
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4 of 5 people (80%) found this review helpful
8.3 hrs on record
Posted: June 29
-Short version: Buy this game. Now.

-Long version: This game is supposed to be a community-made Portal 2 mod, which did not ring high expectations in me, but I loved Portal 2 so I jsut had to buy it. This game (or mod) is suprisingly good. The levels are well done (for casual players of course, if you are a professional strafe jumper, then you will have an easy time). The puzzles are creative, the commentary is very Portal-ish and the fact that you use a "Paint-Gun" to shoot the speed gel and the bounce gel for yourself instead of using a Portal-Gun is so damn good. It gives you so much more possible solutions to some levels...
Seriously, I enjoyed even the harder levels because I had so much solutions in mind and if one didn't work out I just tried the next one. I could keep talking about this game for hours, but it's time to end my review.

I can only recommend this game, because it's so damn good and it brings back those Portal / Portal 2 feelings. 10/10 for me.

PS.: but sssshh... it was 99 cents. (seriously the game costs only 99 cents if you buy it before the 5th of July)
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4 of 5 people (80%) found this review helpful
1 person found this review funny
3.2 hrs on record
Posted: July 2
A fun creative mod for Portal 2 which instead of using a portal gun you use a gun that shoots Paint. Isn't multiplayer unless you play community made maps which are fun to make because in this game unlike in Portal 2 you get more items.
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1 of 1 people (100%) found this review helpful
5.0 hrs on record
Posted: July 3
What can I say? At least, on sale, it's worth.
If you liked portal 2, this is a great continuation.
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5 of 9 people (56%) found this review helpful
1 person found this review funny
Not Recommended
3.7 hrs on record
Posted: June 29
Well that was... Anti-climatic. Great premise, horrible execution and riddled with bugs. The script-writing left a lot to be desired, with jokes that fell flat and no real story. The soundtrack was decent, but the game pushes you to stand right in front of the speakers and after I'd had my ears blown out four or five times, I got annoyed and just turned it off.
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